Device for drilling rai ls



' (No ModeI.) 2 sheets-s116851.

A. L. STANFORD. DEVICE EOE DRILLING RAILS, GIEDEES, AND-TEE LIKE.

N0. 358,755. Patented Mar. l, 1887.

I-II mi UNITED PATENT trice.

ARTHUR L. STANFORD, OF VAUKEGAN, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 358,755, dated March 1,18817.

Application led September 29, 1886. Serial No. 214,821. Y (No modell ToaZZ whom it may concern:

Be it known that I, ARTHUR L. STANFORD, of Waukegan, in the county ofLake and State of Illinois, have invented certain new and usefulImprovements in Hand Metal-Drills, of which the following is a full,clear, and eXact description.

My invention consists in a friction-clutch specially adapted for thepurpose of actuating 1o a hand-drill in place of the usual ratchet.

It further consists in a new feeding device, and in the combination witha suitable frame, so as to adapt the drill for use indrilling rails,girders, and the like.

In the drawings, Figure l is a side View of the drill and a portion ofthe frame. Fig. 2 is a longitudinal section. Fig. 3 is a crossseotion on:v w, Fig. 2. Fig. 4 is a section on the line y y, Fig. 3. Fig. 5 is across-section on the line z z, Fig. 2. Fig. 6 is a perspective view ofthe drill and frame in position for drilling a rail.

A, Figs. l or 6, is a rectangular frame having hooked ends c a. Thesehooks should be of such a size that their ends may form a straight linewith the drill-point. The frame A is provided with one or more lugs, K,Fig. l, by which it is support-ed on the tie, if used for rail-drilling,or any other suitable support, if usedfor drilling girders, Svc.` Theframe A is so constructed in order Vthat a loose rail or girder may bedrilled without being tilted, which cannot be done when the hooks fastento the ange of the rail or girder, while the lugs k, by raising the backof the frame, insure the perpendicularity of the drill to the work, andthese features are combined in a frame which passes underneath, ratherthan over, the rail when used in track-drilling, to permit theuninterrupted use ofthe track while the drill is attached thereto.

B is a case, preferably of hardened steel, having the beveled recesses bb, Fig. 3. Vithi n these recesses are contained the rolls I I, which actupon the cylindrical portion of the drillholder D. Contact between rollsI I, case B,

' and drill-carrier D is maintained by the spring J, which is made ofilat steel bent to the outline shown in Fig. 4, so as to present atleast two points of contact both to the roll I and the case B, thepurpose of this shape of spring being to insure the gripping action ofthe roller at both ends and throughout its length. Two or more spiralsprings might be employed for each roll; but they cannot abut directlyagainst the rolls without becoming misplaced. I have thereforeconstructed the recesses b b with the iiat grooved faces c c in .orderto use a fiat spring.

The feeding device consists of the screw E, working inthe sleeve C, andcarrying on its outer end the notched wheel G, secured by a left-handscrew or by a key, the handle H, and pivot-piece F. The face f, whenused with the frame A as a rail or girder drill, or with an ordinaryknee or frame used in miscellaneous drilling, said knee having abearing-face of the proper width, has a slot cut across it to sustain itin proper position, or it may be simply roughened. Variation in `therelative positions of the pivot-piece F and the feed-screw is permittedby providing the end of the screw with a rounded bearing in thepivot-block, and making the hole g a Very loose fit. The rounded form ofthe end of feed-screw E makes it more durable than the usual pointedshape, and permits better lubrication. It is practicable to so shape theend of the feed-screw only when the permanently-attached pivotblock F isused, as the rounded end would slip out of the impromptu bearing usuallymade by a center punch in the supporting lknee or frame.

The handle H has an oblong hole, g, which permits the lug h, Fig. 5, tobe thrown-in or out of engagement with the feed-wheel G.

To feed the drill it is only necessary to hold the feed-screwstationary, while the drill is revolved. This is accomplished byengaging the handle H with the feed-wheel G, the revolution of theformer being prevented by the pivot-piece F. The device for feeding isthus powerful and positive in action, allowing the use of a coarsefeedscrew. The feed-screw is threaded only on the head e, the body dbeing plain and fitting closely the opening in the sleeve G. Dirt isthus thoroughlycxcluded from the screw-thread, while the coarseness ofthe screw saves it from the danger of stripping, to which a iine threadwould be liable if made so short.

I do not claim, broadly, the invention of a IOO roller friction-clutchVfor rotating a drill, in

which a spring is used to maintain contact bctween the rollers and theother operative parts of the clutch; but I have found that in order 5 tomaintain such contact, so as to produce an instantaneous grip andprevent all chance of slipping, both ends of the roller must be actedupon by the spring or springs having more than a single point of contactwithv the roller and casing, and have so constructed my device as tomeet this difficulty.

That the frame A passes under rather than over the rail, that the hooksa are opposed in a straight line to the drill-point, and that the I 5rear of the frame is raised by the lugs 7c so that the drill isperpendicular to the rail or girder are, jointly, features of myinvention.

1. In a hand-drill, the combination of the cylindrical portion of thedrill-carrier D with the easing B, and rollers I I, held in contact withthe casing and drill-carrier by springpressure applied at or near bothextremities, substantially as and for the purpose set forth.

2. In a hand-drill, the feeding device consisting of a pivot-block, the"feed-wheel G, slotted handle H, and a feed-screw, substantantially asand for the purpose'set forth.

3. In a hand-drill, the pivot-block F, permanently attached to thefeed-screw E, as and for the purpose set forth.

4. The hand-drilling apparatus, consisting of a frame, yfeeding deviceF, G, H, E, and C, and the rotative device D I I J J B, all combinedsubstantially as described. 3 5

5. In combination With a hand-drill, the frame A, passing under therail, having hooked ends a in line with the drill-point, and havingsupporting-lugs k, as and for the purpose de- ARTHUR L. STANFORD.Witnesses:

P. H. 'I'. MAsoN, J.'I. VERDER.

Y scribed.

